The structure is basically the same as that of MG crane, with a leg on one side, running on the ground track;The other side has no legs and runs on the track above the plant.
Semi gantry crane is a kind of track travelling mid-light type crane, can be used where overhead runways are not practical, or in open areas where columns cannot be accommodated. The top main girder is mounted on two A shape columns which are further resting on wheel mounted end carriages. The crane use CD1 type and MD1 type electric as lifting mechanism.
It is especially suitable for the task of loading and unloading long and bulk material and steel, pipes. It also can be used together with other lifting appliance for special purpose. Proper lifting weight is 3-32 tons, span is 3-50 meters, working temperature is -20~+40℃.
There are different gantry crane variants, including: Full Gantries, Semi-Gantries. Gantry crane are commonly found in shipyards, rail yards, scrap yards, special construction sites like where a bridge is being built, or in places like steel mills where overhead room may be an issue.